Facile synthesis of TiO2-based nanosheets by the regulation of cationic surfactants for effective adsorption-photocatalytic removal of high-chroma crystal violet

摘要

TiO2-based nanosheets (TNS) that possess higher specific surface area (similar to 6 times of that of P25) were synthesized using hydrothermal reaction assisted by cationic surfactant cetyltrimethylammonium Bromide (CTAB). The nanosheets exhibit larger size, higher photocurrent, and lower photoluminescence intensity. The adsorption test that includes Langmuir model suggests that the TNS synthesized by adding appropriate amount of CTAB (denoted as CT1-TNS) exhibit higher adsorption of crystal violet (CV) than that of TNS. The highest amount of CV adsorbed by monolayer (eta(max)) of CT1-TNS (60.9 mg/g) is 1.24-fold of that of TNS (49.1 mg/g). The photoactivities of CT1-TNS in degrading CV and Rhodamine B (RhB) are 1.61 and 1.62-fold of that of TNS, respectively. The good reusability of CT1-TNS suggests their potential application for dealing with adsorption-photocatalytic degradation of dyes at high-concentration. (C) 2017 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.